43MS 440, MS 440 W, MS 440 C
English / USA
: Fit the felt prefilter (1) over the HD
filter (2) - note correct installed
position (see ilustration).
: Install HD filter (with felt prefilter)
and carburetor box cover.
: Check carburetor setting and
readjust if necessary.
The felt prefilter helps protect the HD
filter and thus extends its useful life.
For this reason the felt prefilter should
be replaced at more frequent intervals
than the HD filter.
Always replace a damaged filter.
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
General information
The carburetor comes from the factory
with a standard setting
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
adjust the engine idle speed within fine
limits.
Standard setting
: Shut off the engine.
: Turn the high speed adjusting screw
(H) counterclockwise up to the stop,
i.e.
3
/
4
turn from max. lean setting.
: Turn the low speed adjusting screw
(L) one quarter of a turn
counterclockwise from max. lean
setting.
176BA007 KN
2
1
Motor Management Adjusting the Carburetor
L
H
176BA011 KN
4
L
H
3
1
/
4
/
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